Section 126(9)(e) in The Coal Mines Regulations, 2011
(e)the manner of making all concerned persons such as loaders, dressers, supportsmen, shortfirers, sirdars, overmen and assistant managers including persons empanelled for engagement as substitute supportsman or dresser fully conversant with the support plan and the Codes of Standing Orders under this sub-regulation and under regulation 128 and the nature of work to be performed by each in that behalf.